<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>


</head>
<body>
    <div class="ncu">
        南昌大学
    </div>
    <h1 id="test">hhh</h1>
    <div style="background-color: red; font-size: 50px;">哈哈哈</div>
    <h1 >hhh</h1>
    <h1 >hhh</h1>
    <h1 >hhh</h1>
</body>
    <style>
    #test{
        color: green;
    }
    .ncu{
        color:red;
        font-size:50px;
    }
    div{
        color:brown;
    }
</style>
</html>